Advisory Circular
AC66-2.2
Revision 3
Aircraft Maintenance Engineer Licence Examination Subject 2 Aircraft
Engineering Knowledge
10 March 2015
General
Civil Aviation Authority advisory circulars contain information about standards, practices,
and procedures that the Director has found to be an acceptable means of compliance with
the associated rule.
An acceptable means of compliance is not intended to be the only means of compliance
with a rule, and consideration will be given to other methods of compliance that may be
presented to the Director. When new standards, practices, or procedures are found to be
acceptable they will be added to the appropriate advisory circular.
An advisory circular may also include guidance material to facilitate compliance with the
rule requirements. Guidance material must not be regarded as an acceptable means of
compliance.
This advisory circular is intended to be read in conjunction with Part 66 Subpart B of the
rule. If there are any conflicts between the advisory circular and the rule, the rule takes
precedence.
Purpose
This advisory circular provides an acceptable means of compliance for the syllabus content
in respect of written examinations for Subject 2 (Aircraft Engineering Knowledge).
This advisory circular also provides guidance material for recommended study material in
respect of the examination syllabus in this advisory circular.
Related Rules
This advisory circular relates specifically to Civil Aviation Rule Part 66 Subpart B —
‘Aircraft Maintenance Engineer Licence’.
Change Notice
Revision 3 makes the following changes:
(a) updates the web address for Aviation Services Limited (ASL)
(b) deletes reference to an AME sample question booklet being available for purchase
from ASL
(c) removes reference to examination length and number of questions.
Published by
Civil Aviation Authority
PO Box 3555
Wellington 6140
Authorised by
Manager Policy & Regulatory Strategy
Advisory Circular
AC66-2.2
Revision 3
Table of Contents
Rule 66.53 Eligibility Requirements ...................................................................... 3
Examination Overview: Subject 2 ........................................................................ 4
General Examining Objective ........................................................................................... 4
Knowledge Levels ............................................................................................................ 4
Recommended Study Material............................................................................... 5
Syllabus Layout ...................................................................................................... 6
Syllabus: Subject 2 (Aircraft Engineering Knowledge) ..................................... 7
1 Aircraft Drawings ............................................................................................... 7
2 Metrology .......................................................................................................... 11
3 Engineering Tooling ........................................................................................ 12
4 Workshop Practice .......................................................................................... 18
5 Aircraft Standard Hardware ............................................................................ 24
6 Aircraft Cleaning .............................................................................................. 34
7 Aircraft Painting and Finishing ...................................................................... 36
8 Gases and Compounds ................................................................................... 39
9 Aircraft Ground Handling ................................................................................ 40
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Advisory Circular
AC66-2.2
Revision 3
Rule 66.53 Eligibility Requirements
Rule 66.53(a)(2) requires an applicant for an AMEL to have passed written examinations, that are
acceptable to the Director, relevant to the duties and responsibilities of an aircraft maintenance
engineer in the category of licence sought.
The written examinations acceptable to the Director for Subject 2 (Aircraft Engineering
Knowledge) should comply with the syllabus contained in this advisory circular. Each examination
will cover all topics and may sample any of the sub-topics.
The new syllabus has been developed after extensive industry consultation and the objectives
reflect the knowledge required of current technology and international best work practice.
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AC66-2.2
Revision 3
Examination Overview: Subject 2
The pass mark for Subject 2 (Aircraft Engineering Knowledge) is 70%.
Application to sit an examination may be made directly to Aviation Services Limited (ASL). Refer
to http://caanz.aspeqexams.com for examination information.
General Examining Objective
The objective of the examination is to determine that the applicant for an AMEL has adequate
knowledge of Subject 2 to permit the proper performance, supervision and certification of aircraft
maintenance at a level commensurate with the privileges of the various AMEL categories.
Knowledge Levels
LEVEL 1: A familiarisation with the principal elements of the subject.
Objectives: The applicant should:
1. be familiar with the basic elements of the subject.
2. be able to give simple descriptions of the whole subject, using common words and examples.
3. be able to use typical terms.
LEVEL 2: A general knowledge of the theoretical and practical aspects of the subject.
An ability to apply the knowledge.
Objectives: The applicant should:
1. be able to understand the theoretical fundamentals of the subject.
2. be able to give a general description of the subject using, as appropriate, typical examples.
3. be able to use mathematical formulae in conjunction with physical laws describing the subject.
4. be able to read and understand sketches, drawings and schematics describing the subject.
5. be able to apply his/her knowledge in a practical manner using detailed procedures.
LEVEL 3: A detailed knowledge of the theoretical and practical aspects of the subject.
A capacity to combine and apply the separate elements of knowledge in a logical and
comprehensive manner.
Objectives: The applicant should:
1. know the theory of the subject and the interrelationships with other subjects.
2. be able to give a detailed description of the subject using theoretical fundamentals and specific
examples.
3. understand and be able to use mathematical formulae related to the subject.
4. be able to read, understand and prepare sketches, simple drawings and schematics describing
the subject.
5. be able to apply his/her knowledge in a practical manner using manufacturer’s instructions.
6. be able to interpret results and measurements from various sources and apply corrective action
where appropriate.
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Advisory Circular
AC66-2.2
Revision 3
Recommended Study Material
The publication list below provides guidance material for suitable study references for the overall
syllabus content. However, applicants may have to conduct further research using other references
or sources (including the internet) or attend a formal course in order to gain a comprehensive
understanding of all sub-topics in the syllabus.
Where applicable, publication references have been placed below each main topic or sub topic
heading in this syllabus.
Publication List
Study
Ref
Book Title
Author
ISBN
1
A & P Technician General Textbook
Jeppesen
0-88487-203-3
2
Aviation Maintenance Technicians Series - General
Dale Crane
1-56027-422-0
3
A & P Technician Airframe Textbook
Jeppesen
0-88487-205-1
4
Aviation Maintenance Technicians Series, Airframe
- Volumes 1 Structures & 2 Systems
Dale Crane
FAA AC43.13-B: Acceptable Methods, Techniques
and Practices Aircraft Inspection and Repair.
See: FAA website
FAA
0-89100-306-1
Standard Aircraft Handbook
Larry
Reithmaier
0-07-134836-0
7
Dictionary of Aeronautical Terms
Dale Crane
1-56027-287-2
8
Aircraft Structural Technician
Dale Hurst
0-9708109-0-3
5
6
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1-56027-340-2
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Advisory Circular
AC66-2.2
Revision 3
Syllabus Layout
Topic Numbering – left hand column
The syllabus is set out by topics, each of which is identified by a single-digit number. Each topic is
divided into a number of sub-topics, which are identified by two-digit numbers: the first and second
digits of which refer to the topic and the sub-topic respectively.
Each sub-topic is further sub-divided into one or more sub-sub-topics, which are identified by
three-digit numbers. Where applicable, sub-sub-topics may be further subdivided into paragraphs
that are identified by four/five digit alphanumeric sequences.
The three-digit sub-sub-topic numbers shown in the left hand column are used in the ‘knowledge
deficiency reports’ to provide feedback on individual examinations.
Objective description – middle column
The middle column objectively describes each sub-sub-topic by stating, in plain language, its
subject matter and the type of performance or activity required. The objectives are intended to be
simple, unambiguous, and clearly-focussed, outcomes to aid learning.
Knowledge levels – right hand column
The right hand column specifies the knowledge level for each sub-topic heading. The three levels
of knowledge used in this syllabus are described above. Note that the knowledge levels indicate the
depth of knowledge required NOT its safety importance.
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AC66-2.2
Revision 3
Syllabus: Subject 2 (Aircraft Engineering Knowledge)
1
1.1
1.1.1
Aircraft Drawings
Drawing Interpretation
Study Ref. 1 &. 2
Describe the following diagrams/drawings,
a. Detail, assembly and installation drawings
b. Electrical wiring diagrams
c. Logic flowcharts used in trouble shooting
d. Oblique, isometric and orthographic presentations
e. Schematic diagrams
f. Pictorial diagrams
g. Electrical wire charts
h. Pie charts, bar graphs, pictographs and broken line graphs
i. Patterns with metric or inch dimensions
1
1.1.2
Given examples, interpret information contained in diagrams/drawings listed in 1.1.1.
2
1.1.3
State where each of the diagrams/drawings listed in 1.1.1 could be found in an
aeronautical application.
1
1.1.4
State any advantages and disadvantages of the diagrams/drawings listed in 1.1.1.
2
1.2
Working Drawings
1.2.1
Study Ref. 2
Describe the following working drawings
a. Detail Drawing
b. Assembly drawing
c. Installation drawing
d. Perspective drawings
e. Block diagrams
f. Blue prints
1.2.2
Specify where each of the working drawings listed above is used.
1.3
Sectional Drawings
1.3.1
1
1
Study Ref. 2
Describe the following sectional drawings:
a. Revolved section
b. Removed section
c. Complete section
d. Half section
1
1.3.2
Specify where each of the sectional drawings listed above is used
1
1.3.3
Specify the purpose and uses of exploded-view drawings.
1
1.4
Drawing Conventions – Lines
1.4.1
Study Ref. 1 & 2
Given an aircraft drawing, identify the following lines by style and thickness:
a. Outline or visible lines
b. Hidden lines
c. Centre lines
d. Extension lines
e. Dimension lines
f. Cutting-plane and viewing plane lines
g. Phantom lines
h. Short break lines
i. Long break lines
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Leader lines
Sectioning lines
Break lines
Stitch lines
1.4.2
Describe the meaning of each of the lines listed above
1.5
Drawing Information and Data Display
1.5.1
Revision 3
1
Study Ref. 1 & 2
Describe the following drawing features:
a. Title block
b. Title box
c. Revision block
d. Size
e. Drawing or print number
f. Universal numbering system
g. Reference and dash numbers
h. Scale and weight
i. Page number
j. Responsibility
k. Standards
l. Bill of materials
m. Application revision block
n. Notes
o. Zone and station numbers
p. Surface finish and finish marks
q. Wing and fuselage station numbering
r. Identification of paired parts. ( e.g. two identical halves of an engine cowl)
s. Assembly notation for bulkhead electrical connectors on a wiring diagram
t. Standard paper sizes
1.5.2
Describe how each of the drawing features listed above may be presented on an aircraft
drawing.
1.6
Drawing Convention – Lettering, Numbering, Dimensioning, Fits
Clearances, Tolerances and Allowances
1
2
Study Ref. 1 & 2
1.6.1
Define the following in relation to drawing conventions:
a. Terms
b. Tolerance
c. Allowance
1
1.6.2
Show how each of the items listed in 1.6.1 is displayed on a drawing.
a. Terms
b. Tolerance
c. Allowance
2
1.6.3
Calculate from given information maximum and minimum dimensions of a part.
3
1.6.4
Determine tolerance and allowance from information displayed on an aeronautical
drawing.
2
1.6.5
Describe the system of fits and clearances used in aeronautical engineering and give
examples of where each fit may be used including:
a. Force/interference
b. Driving
c. Push
d. Running
2
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Revision 3
1.6.6
Determine drill sizes for boltholes to obtain a desired class of fit.
2
1.6.7
From given information, determine limits for:
a. Bow
b. Twist
c. Wear
2
1.6.8
Describe standard methods for checking fits and clearances for:
a. Shafts
b. Bearings
c. Other parts
2
1.6.9
Describe standard methods of dimensioning
2
1.6.10
Show how dimensions are placed on a drawing.
2
1.6.11
Identify the types of lettering and numbering used on a drawing and give examples of
each.
2
1.7
Care of Drawings
1.7.1
Describe drawing handling and storage practices.
2
1.7.2
Specify procedures for amending, correcting and approving aeronautical drawings.
2
1.8
Basic Drawing Techniques
1.8.1
Show the following drawing functions:
a. Bisect a line
b. Find the centre of a circle
c. Divide a line into equal parts
d. Bisect an angle
e. Construct an ellipse
f. Construct a truncated cone
g. Construct duct or flute intersections
1.9
Drawing Sketches
Study Ref. 1 & 2
Study Ref. 1 & 2
2
Study Ref. 1 & 2
1.9.1
Identify the principles of orthographic and pictorial sketching.
2
1.9.2
Outline where orthographic and pictorial sketches may be used.
2
1.9.3
Describe proportioning in relation to sketching.
1
1.10
Electronic Drawing Media
1.10.1
Ref. 1 & 2
Specify the use of microfilm, microfiche and computerised presentations.
1.11
International Standards
1
Study Ref. 7 & 8
1.11.1
Identify the following international standards:
a. ISO
b. SAE
c. AN
d. MS
e. NAS
f. MIL
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Revision 3
1.11.2
Outline the relevance of the international standards listed above to aeronautical
engineering.
1
1.11.3
Give examples of where each of the international standards listed in 1.11.1 may be
used.
1
1.11.4
Explain the following in relation to the Air Transport Association of America
Specifications 100 and 2100
a. use of
b. format and principles
2
1.12
Hardware Representation on Drawings
Study Ref. 5
1.12.1
Show drawing representation for:
a. Holes
b. Threads
c. Bolts
d. Nuts
e. Rivets
1.13
Drawing Equipment
2
Study Ref.1 & 2
1.13.1
Outline the care and use of drawing instruments and associated equipment.
1.14
Shop Terms and Processes
1.14.1
Describe the relationship between drawing and manufacturing processes.
1
1.14.2
Describe special features on drawings depicting the following assemblies:
a. Castings
b. Forgings
c. Machined parts
d. Sheet metal parts
e. Welded constructions
1
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2.1
2.1.1
AC66-2.2
Revision 3
Metrology
Precision Measuring Devices
Study Ref. 1, 2 & 6
Explain the construction, scale markings, principles of operation, units of accuracy in
both English and Metric terms, of the following precision measuring devices:
a. Outside micrometer
b. Inside micrometer
c. Depth micrometer
d. Thread micrometer
e. Vernier scale micrometer
f. Vernier callipers
g. Vernier height gauge
h. Vernier protractor
i. Combination sets including the stock head, protractor head and the centre head
j. Dial test indicators or dial gauge
k. Clinometer
3
2.1.2
Explain typical uses for each of the above measuring devices and their common ranges.
3
2.1.3
Explain how a DTI reading is corrected when the gauge is not positioned at right angles
to the contact surface.
3
2.1.4
Determine calibration (including calibration standards), testing, and handling and storage
precautions relating to the above precision measuring devices.
3
2.2
Gauges
2.2.1
Describe the physical characteristics, applications and correct usage of the following
devices:
a. Bore gauge
b. Depth gauge
c. Go no-go gauge
d. Thread gauge
e. Optical flats
f. Slip gauges (includes Johannsen type)
g. Thickness (feeler) gauge
h. Divider
i. Inside and outside callipers
j. Odd-leg (hermaphrodite) calliper
k. Telescopic gauge
l. Small hole gauge
m. English and metric steel rules (or scales)
n. Scriber
2
2.2.2
Using the measuring devices identified above, assess how typical gauging or measuring
techniques would be used during aircraft or component maintenance to check for such
things as:
a. bow
b. Twist
c. Bending
d. Buckling
e. Distortion and deformation
f. Internal and external wear
g. Parallelism or taper
h. Stepping
i. Shear
j. Concentricity
k. Flatness (including the use of engineer’s blue)
2
Study Ref. 1 & 2
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AC66-2.2
Revision 3
Engineering Tooling
3.1
Workshop Tooling and Equipment
3.1.1
Describe the features, types, uses, maintenance, calibration, storage and operating
precautions relating to the following workshop equipment and general-purpose hand
tools:
a. Surface plates
b. Surface tables
c. Vee blocks
d. Engineering squares
e. Chisels including, flat cold, single bevel point, double bevel point, round nose,
cape and diamond point. State cutting edge angles for types of chisel and
materials to be cut
f. Scrapers
g. Clamps, vices and presses
h. Hammers and mallets including ball peen and straight peen
i. Pliers such as slip-joint, interlocking, vice-grip, duckbill, needle nose and lockwire (safety-wire) pliers
j. Punches including centre, prick, starting, pin, aligning and hollow shank gasket
punch
k. Screw drivers including the types of drive slot such as slot, cross point, tri-wing,
posidrive, torx and Phillips and Reed and Prince
l. Hand snips such as circle snips, aviation snips, hawks-bill snips and nibblers
m. Wrenches including open-end, box- end, combination, flare-nut, adjustable,
standard sockets, deep sockets, flex sockets, crowsfoot sockets, handles,
ratchet handles, adapters, speed handles, breaker bars, extensions, universal
joints and impact drivers
n. Grease guns, oil cans and lubrication methods
3.2
Special Cutting Tools
3.2.1
Outline the construction, characteristics, use and precautions associated with the
following tools.
a. Deburring tool
b. Trepanning tool (chassis punch)
c. Counter bore
d. Broach
e. Spot-facer
f. Microshaver
2
3.2.2
In relation to the tools listed above, state typically when each tool and their associated
process would be used on aircraft.
2
3.2.3
Identify the hole cutting tools which produce the least to the best results in terms of finish
and accuracy.
1
3.3
Twist Drill Bits
3.3.1
Describe a common metal twist drill bit in respect of the following features:
a. Purpose of spiral flutes
b. Shank, body and heel (point)
c. The lands and margin
d. Lip relief or heel angle
e. Cutting edge
f. Lip angle
g. Split point
Study Ref. 1, 2 & 6
2
Study Ref. 3
Study Ref. 1, 2 & 6
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3.3.2
Explain the process for hand sharpening a twist drill bit.
3
3.3.3
Describe the cutting and lip angles for drilling different materials such as:
a. Heat-treated steel
b. Stainless steel
c. Aluminium/magnesium alloys
d. Lead
e. Plastics, plexiglass and perspex
2
3.3.4
Determine size notation for number, letter and fractional drills.
2
3.3.5
Describe drill size identification stamp on shank.
2
3.3.6
Outline the uses of the following drills.
a. Parallel
b. Taper
c. Square shank
1
3.3.7
Describe the information contained on a drill chart with respect to the following:
a. Tap size
b. Tap drill
c. Clearance drill
d. Body drill
2
3.3.8
Describe the drill speeds and feed speeds for various aircraft materials.
2
3.3.9
Identify the types of lubricant specified for drilling various materials.
3.3.10
Diagnose the cause and prevention of various hole defects which may occur when
drilling metal.
3
3.3.11
Detail precautions relating to the metal drilling process with particular regard to:
a. Protective/safety equipment
b. Unprotected hair and loose clothing
c. Drive belts
d. Chuck keys
e. Material security and clamping
f. Overheating
g. Prevention of excessive work hardening
h. Bit breakthrough
i. Drilling into blind spaces
j. Drilling around flammable/explosive materials
3
3.4
Hole Cutters
3.4.1
Describe the construction, characteristics, identification and operation of the following
hole-cutters:
a. Hole saw
b. Fly cutter
c. Countersink including a standard and stop countersink (micro countersink)
d. Spiggoted countersink
3.5
Reamers and Reaming
3.5.1
Describe the characteristics and uses of the following types of reamer:
a. Tapered (straight flute)
b. Tapered (spiral flute)
c. Bottoming
d. Expanding
Study Ref. 1 & 2
1
Study Ref. 1 & 2
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Revision 3
e. Adjustable
f. Stepped
3.5.2
Determine the common reaming allowance provided for in a drilled hole.
3
3.5.3
Specify where and when reaming is commonly carried out during aircraft component
maintenance.
2
3.5.4
Determine the correct reaming operation and associated precautions.
3
3.5.5
Diagnose the cause of common reaming defects including chattering and scoring.
3
3.5.6
Explain the care and storage of reamers and how to detect and rectify unserviceable
reamers.
3
3.5.7
Describe the purpose, characteristics and uses of high-speed steel and carbon-steel
reamers.
1
3.5.8
Compare the difference between hand and machine reamers.
1
3.6
Files and Filing
3.6.1
Describe the component parts of a file including the following:
a. Tang
b. Heel
c. Face
d. Edge
e. Length
f. Point
1
3.6.2
Differentiate between double and single cut files, including teeth angles.
1
3.6.3
Describe the coarseness of a file including the following:
a. Coarse
b. Bastard
c. Second
d. Smooth
e. Dead smooth
1
3.6.4
Give examples of the metal removal and finish capability of each type of file.
2
3.6.5
Outline the characteristics and uses of the following types of files:
a. Mill
b. Half round
c. Knife-edge
d. Wood rasp
e. Hand
f. Three-square
g. Round
h. Vixen
i. Hand-taper
j. Pillar
k. Warding files
1
3.6.6
Describe the purpose of a safe-edge on a file and when it would be used.
2
3.6.7
Describe the following proper filing techniques with examples of when each technique
would be used:
a. Draw-filing
b. Cross-filing
c. Rounding corners
2
Study Ref. 1, 2 & 6
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d. Removing burred and slivered edges
e. Lathe filing
3.6.8
Specify proper care and protection of files, including the use of a file card.
1
3.6.9
Identify the types of file most suitable for cutting various types of hard and soft aircraft
materials.
2
3.6.10
State the three distinguishing features which identify a file.
1
3.7
Hacksaws
3.7.1
Outline the construction and use of the common hacksaw.
1
3.7.2
Differentiate between an all-hard blade and the flexible hacksaw blade.
1
3.7.3
State where each of the blades listed above would be used.
1
3.7.4
Describe how hacksaw blades are categorised in terms of tooth pitch.
2
3.7.5
Determine the number of teeth per inch of hacksaw blades which would be suitable for
cutting various metal products found on an aircraft.
3
3.7.6
Describe common hack sawing procedures with particular regard to:
a. Strokes per minute
b. Blade selection
c. Fitting a blade in the frame
d. Blade tension in the frame
e. Securing the work
f. Number of teeth in contact with the material
g. Starting and finishing the cut
2
3.8
Taps, Dies and Die Nuts
3.8.1
Study Ref. 1 & 2
Study Ref. 1 & 2
State the three common tap types that make up a set and where each would be used in
aircraft engineering.
1
3.8.2
Describe the procedure for correctly tapping the thread in a blind and open hole
including:
a. Tap selection
b. Hole sizing
c. Hand tapping
d. Use of solid and T-handles
2
3.8.3
Describe the characteristics of adjustable round split and hexagonal dies, and where
each would most likely be used.
1
3.8.4
Describe the thread cutting process using a die, including the preparation of the metal
stock.
2
3.8.5
Describe the die-stock and the correct installation and adjustment of a die.
2
3.8.6
Specify the purpose and correct use of a die nut.
2
3.9
Torque Wrenches
3.9.1
Determine how torque is derived and annotated.
3
3.9.2
Explain why torque loading of aircraft hardware is critically important.
3
Study Ref. 1 & 2
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Revision 3
3.9.3
Apply standard torque values and tables.
3
3.9.4
Outline the construction, characteristics, principles of operation and uses of the following
types of torque wrench:
a. Deflecting beam
b. Torsion bar
c. Toggle (including micrometer type)
1
3.9.5
With respect to torque wrenches, state the relationship between the following:
a. Applied force
b. Lever length
c. Required torque
d. Indicated torque
2
3.9.6
Solve problems relating to the relationships listed above.
3
3.9.7
Evaluate the effects and use of the following torque wrench accessories and, where
applicable, re-calculate adjusted torque values:
a. Extension bars
b. Handle extensions
c. Torque multipliers
3
3.9.8
Explain the correct use of a torque wrench.
3
3.9.9
Define the following terms:
a. Break torque
b. Brag torque
1
3.9.10
Explain how each of the terms listed above is determined and applied in aircraft
maintenance.
2
3.9.11
Evaluate the effects of dry and lubricated threaded assemblies when setting torque
values.
3
3.9.12
Detail torque wrench testing and calibration procedures and periodicities, including the
following:
a. use of torque wrench testing fixtures
b. actions to be taken if a torque wrench is found to be significantly out of
calibration
3
3.9.13
Detail the following:
a. correct torque wrench handling and storage procedures
b. actions to be taken if a torque wrench is dropped
3
3.9.14
Describe the procedure for aligning the split pinhole on a nut that is being torqued to a
particular value.
2
3.10
General Purpose Power Tools
3.10.1
Specify the operation and application of the following tools.
a. Drilling machines (Pneumatic, electric and bench)
b. Machine grinder
c. Lathe
d. Milling machines
e. Shapers
f. Scrapers
g. Band saws
h. Nibbler
i. Riveting gun
Study Ref. 3 & 6
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m.
n.
AC66-2.2
Electric and pneumatic power hacksaw
Soldering iron
Sanders
Routers
Heat guns
3.10.2
In relation to the tools listed above, state the following:
a. Special characteristics
b. Precautions
c. Conditions relating to their use.
3.11
Bench Grinders
3.11.1
3.12
3.12.1
3.13
3.13.1
Revision 3
1
Study Ref. 6
Describe the construction and operation of a bench grinder including the following:
a. Grinding techniques
b. Tool rest clearance
c. Operating precautions
2
Grinding Wheels
Study Ref.6
With regard to grinding wheels, describe:
a. Silicon carbide and aluminium oxide abrasives
b. Wheel selection to suit material types
c. Abrasive size
d. Vitrified, silicate, resinoid, rubber and shellac bonds
e. Voids
f. Grinding wheel dressing
g. Grinding wheel installation
h. Wheel defects
2
Sheet Metal Tools
Study Ref. 3 & 6
Describe the characteristics, operating principles and precautions relating to the
following sheet metal working tools and give examples of when each may be used:
a. Dollies
b. Bench plate and the various types of stake
c. V-Blocks
d. Hardwood form blocks
e. Sandbag
f. Shrinking block
g. Cleco fastener
h. Squaring shears
i. Scroll shears
j. Throatless shears
k. Rotary punch
l. Ketts saw
m. Reciprocating saw
n. Power drills (various applications)
o. Bar folder
p. Cornice brake
q. Slip roller
3.14
Lubrication and Cooling of Metal Cutting Tools
3.14.1
Identify the types of lubricant and cooling medium used for common metal cutting
operations.
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4
4.1
4.1.1
4.2
4.2.1
4.3
AC66-2.2
Revision 3
Workshop Practice
Basic Principles of Sheet Metal Repair
Study Ref. 3 & 5
Outline the basic sheet metal principles and practices when used in the repair of
structural damage, with emphasis on the following tasks:
a. Sizing up the job
b. Patch design
c. Type, size and number of rivets needed
d. Repair material selection
e. Inspection of surrounding area
f. Clean-out of damage
g. Creation of paper transfers
h. Patch preparation
i. Stop drilling
j. Use of relief holes in bends
k. Creation of lightening holes
2
Maintaining Original Strength
Study Ref. 3, 5 & 6
Define the term “original strength” with regard to:
a. Cross-sectional area
b. Bending loads
c. Crack propagation
d. Splicing
e. Material reinforcements
f. Substitution of materials
g. Heat-treatment of repair materials
h. Rivet size selection
i. Calculation of bearing strength and shear strength
2
Maintaining Original Contour
4.3.1
Study Ref. 3, 5 &, 6
Define the term “original contour” and
1
4.3.2
Specify how original contour is maintained while carrying structural repairs.
2
4.4
Keeping Weight to a Minimum
4.4.1
Study Ref. 3, 5 & 6
With regard to design and implementation of structural repairs, describe:
a. Principles to be observed
b. How weight is kept to a minimum
2
4.4.2
Assess and calculate the weight of a completed repair and
2
4.2.3
Determine the effects of a completed repair on surrounding structure.
2
4.5
Inspection of Damage
4.5.1
Study Ref. 3, 5 & 6
Describe the symptoms of structural damage resulting from:
a. Heavy landing
b. Lightning strike
c. Impact with objects or service vehicles
d. Excursion off a runway
e. Over stressing
f. Turbulence
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4.6
4.6.1
4.7
4.7.1
4.8
AC66-2.2
Revision 3
Defect Definitions
Study Ref. 5 & 6
Define the following terms and give a practical example of each.
a. Brinelling
b. Burnishing
c. Burr
d. Chattering
e. Corrosion
f. Crack
g. Cut
h. Dent
i. Erosion
j. Galling
k. Gouge
l. Inclusion
m. Nick
n. Pitting
o. Scratch
p. Score
q. Stain
r. Upsetting
1
Damage Classification
Study Ref. 3 & 6
Describe, with examples, the following classifications of damage:
a. Negligible damage
b. Damage repairable by patching
c. Damage repairable by insertion
d. Damage necessitating replacement of parts
2
Stresses in Structural Members
4.8.1
Study Ref. 6
Identify the stresses in an aircraft structure resulting from flight and ground loads.
4.9
Metal Forming Operations
4.9.1
Study Ref. 6
Describe the following sheet metal forming operations:
a. Bumping
b. Crimping
c. Stretching
d. Shrinking
e. Folding
f. Bending
g. Shearing
h. Forming
2
2
4.9.2
In relation to the sheet metal forming operations listed above, describe examples of:
a. Where each is used
b. How each is carried out
c. Tools used
d. Precautions to be observed
4.10
Straight Line Bends
4.10.1
Explain criteria which must be considered when designing and constructing a straightline bend, including:
a. Material thickness, alloy composition and temper
b. Material thickness in regard to bend radius
c. Material grain considerations when planning a bend
2
Study Ref. 6
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d.
e.
f.
g.
h.
AC66-2.2
Revision 3
Bend radius (maximum, minimum and neutral)
Bend allowance
Setback
Brake or sight lines
Marking of sheet metals (includes method of marking and instruments normally
used)
4.10.2
Define bend allowance, including:
a. Its importance
b. How it is calculated using given formulae for 90 degree and other than 90
degree bends
2
4.10.3
Describe the four factors governing bend allowance.
2
4.10.4
Describe the technique for estimating bend allowance.
2
4.10.5
Calculate the sheet metal size/area required to fabricate a component from given
dimensions and taking into account relevant bend allowances.
3
4.10.6
Explain the following sheet metal bending terms:
a. Leg
b. Thickness
c. Flange
d. Mold line
e. Mold point
f. Setback
g. Neutral axis
h. Bend tangent line
i. Bend radius
j. Bend allowance
k. Bend line
l. Flat
m. Base measurement
n. Closed angle
o. Open angle
p. “K” number
1
4.10.7
Calculate setback using given formulae.
3
4.10.8
Explain the making and use of a pattern in sheet metal layouts.
3
4.10.9
Describe the purpose and construction of lightening holes on sheet metal components.
2
4.10.10
Describe the hand forming tools, equipment, procedures and techniques in relation to
the following:
a. Straight line bends
b. Formed or extruded angles
c. Flanged angles
d. Forming by stretching
e. Curved flanged parts
f. Bumping
g. Joggling
h. Working with stainless steel
i. Working with magnesium
2
4.10.11
Describe special techniques and practices associated with operating bending machines
especially when associated with making bends of minimum radius in light alloys.
2
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Revision 3
4.11
Sheet Metal Rivet Layout
4.11.1
Explain rivet layout in terms of the following criteria:
a. Number of rivets required
b. The size and style of rivet to use
c. Material, temper condition and strength
d. Size of the rivet holes
e. Distance of the rivet holes and rivets from the edge of the patch
f. Spacing of the rivets throughout the repair and the factors which affect spacing
g. Special patch design and rivet spacing requirements for metal stressed skin
repairs in both pressurised and unpressurised hulls
h. Maximum and minimum allowable overlap when riveting a splice
4.12
Rivet Description
4.12.1
Explain the following rivet characteristics and riveting criteria:
a. Rivet size (diameter)
b. Types of rivet head
c. Total rivet length (countersunk and other types)
d. Grip length
e. Dimensions of a correctly bucked head
f. Shop head allowance
g. Edge distance calculation
h. Rivet material selection
i. Rivet heat-treatment requirements and desirable properties achieved through
heat treatment or freezing. (includes ice box rivets)
j. Rivet pitch
k. Rivet spacing requirements
l. Transverse pitch
m. Laying out a rivet pattern
n. Riveting through tubular components
o. Substitution of rivets
p. Riveting techniques in confined areas
3
4.12.2
Apply rivet characteristics and riveting criteria to practical riveting exercises.
3
4.13
Riveting Equipment
4.13.1
Identify the types, construction, precautions and use of the following riveting equipment:
a. Hole duplicators
b. Rivet cutters
c. Bucking bars
d. Hand rivet and draw sets
e. Countersinks
f. Dimpling dies
g. Pneumatic rivet guns
h. Squeeze riveters
2
4.13.2
Describe how rivet sets are categorised and selected for riveting the various head
shapes and sizes.
2
4.14
Rivet Installation and Removal Techniques
4.14.1
Specify the following procedures and techniques relating to riveting:
a. Rivet hole size determination
b. Determining factors such as material thickness and rivet specifications
associated with flush machine countersinking
Study Ref. 6
3
Study Ref.6
Study Ref. 3 & 6
Study Ref. 3 & 6
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Revision 3
c.
d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
Limits of surface protrusion or submersion for countersunk rivets
Dimpling requirements with respect to material work hardening
Drilling the hole
Countersinking and dimpling
Factors which determine the use of machine countersinking
Thermo-dimpling
Bucking
Hand driving
Pneumatic driving
Squeeze riveting
Microshaving and how a microshaved rivet is identified after completion of the
process
n. Rivet removal procedures
o. Selecting the correct drill size for removal of the various types of rivet, including
special rivets
4.15
Rivet Defect Identification
4.15.1
In regard to riveted joints, explain the following conditions and criteria:
a. Inspection requirements and techniques
b. Shank joggling
c. Shear failure
d. Bearing failure
e. Head failure
4.16
Special Rivets – Self Plugging (friction-lock)
4.16.1
Describe the uses and selection of rivet:
a. Types (e.g. tucker pop, cherry, chobert, avdel and semi-pierced)
b. Rivet guns and tools
2
4.16.2
Describe the procedures or techniques relating to rivet:
a. installation
b. removal
c. inspection techniques
2
4.17
Special Rivets – Self Plugging (mechanical Lock)
4.17.1
Study Ref. 3 & 6
3
Study Ref. 1, 2 & 6
Study Ref. 1, 2 & 6
Compare the physical differences between friction lock and mechanical lock rivets.
2
4.17.2
Describe the strength relationship between structural rivets, e.g. hi-shear (pin) rivets and
equivalent diameter bolts.
2
4.17.3
Describe the design characteristics, dimensional classification, installation techniques,
and uses of the following rivets and special fasteners:
a. Huck lokrivet
b. Olympic loks
c. Cherrymax (self-plugging)
d. Cherry lock rivets
e. Bulbed cherrylock blind rivets
f. Pull-through rivets
g. Rivnuts
h. Dill lock-screws and lock-rivets
i. Deutsch rivets
j. Hi-shear rivets
k. Lock bolts
l. Hi-loks
m. Hi-lites
n. Cherrybucks
2
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Revision 3
o. Taper-lok
p. Hi-tigue
q. Jo-bolts
4.18
4.18.1
Specific Types of Metal Repairs
Study Ref. 3 & 6
Describe basic techniques and special features relating to the following repair types:
a. Flush patch for a stressed skin
b. Stringer repair
c. Leading edge repair
d. Trailing edge repair
e. Smooth skin repair
f. Elongated octagonal patch
g. Round patch
h. Panel repair
i. Former or bulkhead repair
j. Longeron repair
k. Spar repair
l. Rib and web repair
m. Splicing and overlapping (e.g. single-lap)
2
4.18.2
Specify the design criteria for the repair of tubular structure with respect to the following:
a. Angles
b. Dimensions of tubular weld repairs
c. Patching
d. Inner and outer sleeves
e. Splicing
2
4.18.3
Describe non-welded repair techniques for tubular structural members.
2
4.19
Structural Sealing
4.19.1
4.19.2
Study Ref. 8
Describe common methods and applications for structural sealing including:
a. Rubber sealing of joints, seams, doors and access panels.
b. Cables, tubing and mechanical linkages passing through structure.
c. Wires and tubes passing through pressure bulkheads.
2
Outline the following characteristics relating to the use of sealants, rubbers and
associated materials:
a. Sealant repair processes
b. Sealing compounds
c. Sealing materials
d. Application processes
e. Bonding agents
f. Natural rubber products
g. Synthetic rubbers
h. Characteristics of rubbers
i. Handling and storage precautions for rubber
j. Vulcanising
k. Inspection of rubbers and sealants
l. Common defects found in rubbers and sealants
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5.1
5.1.1
5.2
5.2.1
AC66-2.2
Revision 3
Aircraft Standard Hardware
Identification of Aircraft Hardware.
Study Ref. 6 & 8
Identify the following common classification systems for aircraft hardware and where
each would normally be found:
a. AN
b. NAS
c. MS
1
Rivets
Study Ref. 6
By means of head marking and alpha code (A, AD, B, D etc); distinguish rivets made
from the following aircraft materials:
a. 1100
b. 2117T
c. 2017T
d. 2017T-HD
e. 2024T
f. 5056H
3
5.2.2
Determine which of the common rivets require heat-treatment before use.
3
5.2.3
Identify the type of material rivets would be made of when riveting metals commonly
used on aircraft, such as:
a. Aluminium alloys
b. Magnesium
c. Titanium
d. Mild steel
e. Nickel alloy steels
f. Carbon steels
g. Stainless steels
1
5.2.4
Describe the physical characteristics, common uses and AN identification code for the
following types of solid shank rivet:
a. Countersunk head 78 degrees
b. Countersunk head 100 degrees
c. Round head
d. Flat head
e. Brazier head
f. Universal head
2
5.2.5
Describe the process for heat-treating rivets and why some rivets are stored in an
icebox.
2
5.2.6.
Explain which rivet types may be substituted for others.
3
5.2.7
Explain, with examples, the AN identification marking system for solid shank rivets.
3
5.3
Classification of Threads
5.3.1
5.3.2
Study Ref. 1, 2 & 6
Describe the following criteria pertaining to threads:
a. Screw thread nomenclature and common thread angles
b. Single and multi-start
c. Maintenance and lubrication
2
Specify the thread form, advantages, disadvantages and common aviation applications
of the following types of thread:
a. NC
b. NF
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c.
d.
e.
f.
g.
h.
i.
AC66-2.2
Revision 3
UNC
UNF
Metric
BSW
BSP
BA.
Special thread types such as square, buttress, acme etc
5.3.3
Describe the use of thread charts.
2
5.3.4
Specify how aviation threads are designated in terms of their dimensions, tolerances and
class of fit.
2
5.3.5
Specify how screw threads are measured.
2
5.4
Bolts, Studs and Dowels
5.4.1
Study Ref. 1, 2 & 6
Explain how a standard aircraft bolt is identified in terms of
a. Length
b. Grip length
c. Diameter
3
5.4.2
Describe the AN codification system (and how it is broken down) for standard aircraft
bolts and the common head styles for AN bolts.
2
5.4.3
Describe the UNF markings on a bolt in terms of diameter and TPI.
2
5.4.4
Describe the SAE and metric classification system for aircraft bolts.
2
5.4.5
Specify how the manufacturing thread tolerance of an aircraft bolt is classified and give
examples of the classes of fit associated with common types of bolt.
2
5.4.6
Describe the material head marking system for the following standard aircraft bolts:
a. Corrosion resistant steel
b. Standard steel
c. Close tolerance including NAS close tolerance
d. Aluminium alloy
e. Low strength material
f. Magnetically inspected
g. Special purpose
2
5.4.7
State how the following special purpose bolts are identified and where each may be
used:
a. Internal wrenching bolts
b. Clevis bolts
c. Drilled head bolts
d. Undrilled shank
e. Drilled shank
f. Eye bolt
2
5.4.8
Describe the types of stud and dowel used on aircraft or aircraft components and how
stud and dowel threads may vary when inserted into different metals.
2
5.5
Nuts
5.5.1
Describe the AN classification (and how it is broken down), applications and precautions
relating to the following nuts:
a. Castle
b. Shear castle
c. Plain
Study Ref. 1, 2 & 6
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d.
e.
f.
g.
h.
i.
j.
k.
l.
m.
n.
o.
p.
q.
r.
s.
AC66-2.2
Revision 3
Lock (check)
Slotted engine
Wing
Machine screw
Self locking
Low temperature self-locking
Metal self locking
Shear self locking
Anchor
Tinnerman
Boots self locking
Stainless steel self locking
Elastic stop
Sheet steel
Internal and external wrenching
Pal
5.5.2
Explain how the self-locking feature of fibre, nylon and steel locknuts is achieved.
5.6
Washers
5.6.1
Describe the identification, features, applications and special requirements of the
following washers:
a. Plain washers
b. Lockwashers (spring washers)
c. Shakeproof lockwashers
d. Tab washers and locking plates
e. Special washers
f. Large area washers
g. High strength washers
h. High strength countersunk washers
5.7
Installation of Nuts, Bolts, Studs and Dowels
5.7.1
5.7.2
3
Study Ref. 1, 2 & 6
Study Ref. 1, 2 & 6
Explain the following practices and precautions associated with the installation of nuts,
washers, bolts, studs and dowels:
a. Bolt hole preparation
b. Clearances
c. Oversize or elongated holes
d. Close tolerance installations
e. Fits
f. Material selection and compatibility
g. Purpose and use of washers under the bolt head or the nut
h. Precautions associated with the use of spring washers on light alloys or soft
materials
i. Use of steel bolts/nuts on magnesium and the associated precautions
j. Correct bolt head placement
k. Grip length selection
l. Torque loading of nuts and bolts
m. Safetying of nuts and bolts using split (safety) pins
n. Installation and locking of clevis bolts in control cable assemblies
o. How fibre and steel locknuts are checked for serviceability and effective locking
p. Precautions and environmental limitations associated with the use of self-locking
nuts
q. Selection of acceptable fastener alternatives
r. Special materials and installation requirements associated with fasteners used
on powerplant exhaust systems
s. Removal, insertion and locking techniques for studs and dowels
Explain standard practices and techniques relating to lockwiring (safety wiring) fasteners
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AC66-2.2
Revision 3
and componentry, including:
a. identification of components commonly lockwired
b. Use of lockwire pliers
c. Correct direction for RH and LH threads
d. Lockwire angles, wire turns and tension
e. Use of tabs
f. Locking of multiple fasteners
g. Bending of lockwire ends
h. Types of lockwire and where each may be used
i. Lockwire holes in fasteners
j. Repair of lockwire holes
k. Inspection and certification of locked components
l. Identification of locking defects
5.8
Screws
5.8.1
Describe the following types of screw:
a. Machine
b. Structural
c. Self tapping
d. Wood
2
5.8.2
Outline the physical characteristics, applications, identification and precautions for the
following screw types:
a. Fillister-head machine
b. Flat-head machine
c. Round-head machine
d. Truss-head machine
e. Fillister-head structural
f. Flat head structural
g. Washer-head
h. Round, CSK oval, truss and 100 degree CSK self tapping
i. Drive
j. Wood
2
5.9
Pins, Keys and Circlips
5.9.1
Study Ref. 1, 2 & 6
Study Ref. 1, 2 & 6
Outline the features, applications, classification, precautions and installation practices
relating to the following types of pins:
a. Roll
b. Clevis
c. Cotter
d. Taper
e. Safety (split pins)
2
5.9.2
Outline the construction, uses, installation, precautions and defects associated with the
following types of key and keyway:
a. Plain
b. Tapered
c. Woodruff
d. Round
e. Splines
2
5.9.3
Describe the types, uses, installation and removal of circlips and quick release fasteners.
2
5.10
Repair of Damaged Internal Threads
5.10.1
Describe the principles, applications, installation, removal, classification, tooling,
precautions and trade practices associated with the use of heli-coils.
Study Ref. 1, 2 & 6
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Revision 3
5.10.2
Describe the techniques and practices associated with the replacement of threaded
bushings and inserts.
2
5.10.3
Describe the characteristics, principles, advantages, limitations, installation and removal
procedures relating to acres fastener sleeves.
2
5.11
Panel Fasteners
5.11.1
Outline the characteristics, construction, principles of operation, advantages, limitations,
classification, installation and removal procedures relating to the following special panel
fasteners:
a. Turnlock
b. Dzus
c. Camloc
d. Airlock
5.12
Control Cables, Rods and Fasteners
5.12.1
Outline the construction, applications, installation procedures and precautions relating to
the following classifications of cable:
a. Nonflexible
b. Flexible
c. Extra-flexible
d. Lockclad
2
5.12.2
Describe how aircraft control cables are classified in terms of wires in a strand and
number of strands in a cable, including standard wire gauge (SWG).
2
5.12.3
With respect to aircraft control cables, state the:
a. Various materials which aircraft control cables may be manufactured from
b. Advantages and disadvantages of each type
c. Control systems in which each type would normally be used
1
5.12.4
Describe the construction, applications and uses of the following cable fittings:
a. Double shank ball-end
b. Single shank ball end
c. Rod terminal
d. Threaded cable terminal
e. Fork end cable terminal
f. Eye end cable terminal
g. Spring connectors
1
5.12.5
Describe cable swaging, splicing and testing procedures and precautions.
2
5.12.6
Compare the advantages and disadvantages of cable over push-pull control systems.
1
5.12.7
Describe the installation of nicopress sleeves and the associated tooling used.
2
5.12.8
Explain the characteristics, assembly procedures, identification and precautions
associated with cable turnbuckle assemblies.
3
5.12.9
Explain safety inspection requirements relating to both American and British style
turnbuckles.
3
5.12.10
Explain the left-hand threaded end of a turnbuckle barrel.
3
5.12.11
Explain the following turnbuckle locking methods and where each would most likely be
used:
3
Study Ref. 1, 2 & 6
2
Study Ref. 1, 2 & 6
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a.
b.
c.
d.
e.
AC66-2.2
Revision 3
Locking clip
Double wrap
Double wrap spiral
Single wrap
Single wrap spiral
5.12.12
Explain how cables are visually and physically inspected for corrosion or broken strands.
3
5.12.13
In relation to push-pull tube assemblies, describe the :
a. Construction
b. Assembly
c. Locking
d. Installation, including the correct installation of clevis pins
2
5.12.14
Describe the construction, operation, use and inspection of flexible control systems such
as Bowden and Teleflex.
2
5.13
Springs
5.13.1
State the types, materials, applications, limitations, inspection and testing of springs.
5.14
Bearings
5.14.1
Outline the characteristics, construction, applications, loads and installation and removal
requirements of the following types of aircraft bearing:
a. Plain
b. Ball
c. Roller
d. Needle
e. Taper
f. Self aligning
g. Air
2
5.14.2
Describe testing, cleaning and inspection of bearings including the use of sonic cleaners.
2
5.14.3
Specify the lubrication requirements for bearings:
a. At installation
b. In service
2
5.14.4
Identify the factors that determine the types of lubricant used in a bearing.
2
5.14.5
Describe the following defects found in bearings and state their likely causes:
a. Brinelling
b. Burnishing
c. Galling
d. Spalling
e. Abrasion
f. Burning
g. Burring
h. Chaffing
i. Chipping
j. Corrosion
k. Fretting
l. Gouging
m. Grooving
n. Cutting
o. Inclusions
p. Peening
q. Pitting
2
Study Ref. 6
1
Study Ref.6
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AC66-2.2
Revision 3
Scoring
5.14.6
Describe bearing pre-load and how it is established.
2
5.14.7
Explain storage and handling requirements for bearings, including the spinning of dry
bearings with compressed air.
3
5.15
Transmissions
5.15.1
Outline the characteristics, applications, installations, inspection requirements and
defects associated with the following types of gears:
a. Spur
b. Helical
c. Bevel
d. Hypoid
e. Worm
f. Planetary
g. Differential
h. Sector
i. Rack and pinion
1
5.15.2
Describe and calculate gear ratios relating to reduction and multiplication systems.
2
5.15.3
Identify driven, driver and idler gear systems.
1
5.15.4
Explain gear patterns and the calculation and setting of backlash.
3
5.15.5
Describe gear lubrication systems and gear failure detection devices.
2
5.15.6
Describe gear inspection and common failure characteristics.
2
5.15.7
Specify the types, typical uses, installation, maintenance and defects relating to:
a. Belts
b. Pulleys
c. Chains
d. Sprockets
2
5.15.8
Describe the operation, installation and inspection of screw jacks, levers and push-pull
rod systems.
2
5.16
Seals and Gaskets
5.16.1
Describe the characteristics, uses and precautions associated with the following seals
and packings:
a. U-ring
b. O-ring
c. V-ring (chevron)
d. U-cup
e. V-ring male and female
2
5.16.2
Specify the use and installation of backup rings
2
5.16.3
Describe the identification of o-rings.
2
5.16.4
Describe the characteristics, uses and precautions associated with the following
gaskets:
a. Solid copper washer
b. Copper asbestos (or equivalent crushable gaskets)
c. Cork gaskets
2
Study Ref. 1
Study Ref. 1 & 2
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Revision 3
d. Rubber sheeting
e. Felt wipers
5.17
Sealing Compounds
5.17.1
Describe the characteristics, uses, mixing ratio calculations and precautions associated
with the following sealing compounds:
a. One-part sealant
b. Two-part sealant
2
5.17.2
Describe base sealing compound, accelerator and sealant curing.
1
5.18
Rigid Fluid lines
5.18.1
State the common materials used in the construction of rigid aircraft fluid lines.
1
5.18.2
Specify the advantages and disadvantages of each type of rigid fluid line.
2
5.18.3
Identify the type of tubing that would be used for low, medium and high-pressure
systems.
2
5.18.4
Identify the causes of failure in each of the types of rigid fluid lines.
2
5.18.5
State how broken or damaged rigid fluid lines may be repaired/rejoined in service.
2
5.18.6
Specify the various heat-treatment requirements for rigid fluid lines.
2
5.18.7
Identify the types of aluminium alloy used in rigid fluid lines by reference to their colour
bands.
2
5.18.8
Using the magnet test and nitric acid test, identify the following rigid tubing materials:
a. Carbon steel
b. 18-8 stainless steel
c. Monel
d. Nickel steel
2
5.18.9
Describe the fabrication of rubber hose joints for rigid pipes, with particular respect to:
a. Pipe segment gap.
b. Hose length.
c. Pipe beads.
d. Clamping techniques.
e. Bonding.
f. Hose removal and installation techniques.
2
5.19
Fabricating and Installing Rigid Tubing
5.19.1
Study Ref. 1 & 2
Study Ref. 1, 2 & 6
Study Ref. 1, 2 & 6
Describe the processes, tooling used and precautions to be observed for each of the
following:
a. Tube cutting
b. Tube bending
c. Connection by single and double flare (one or two piece) connectors
d. Flaring of pipes
e. Flareless fittings
f. Beading
g. Rigid tube installation and tightening techniques, routing, supporting and
securing
h. Repairing of rigid tubing
i. Testing of rigid pipes
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Advisory Circular
AC66-2.2
Revision 3
5.19.2
State the various types of AN fittings and pipe fittings.
1
5.19.3
Discuss the interchangeability of various types of AN and pipe fittings.
1
5.19.4
With respect to MS (Military Standard) flareless fittings, describe the:
a. Identification
b. Uses
c. Installation practices
2
5.19.5
State the standard unions for the following types of pipes:
a. Hydraulic
b. Fuel
c. Oil
d. Pneumatic
e. Air system
1
5.19.6
Explain how flare thickness reduction due to “wiping” is eliminated during assembly of a
rigid hydraulic pipe.
3
5.20
Flexible fluid lines
5.20.1
Describe the characteristics, applications, comparative advantages and precautions
associated with the following flexible fluid line materials:
a. Synthetic – neoprene, Buna-N and butyl
b. Rubber hose
c. Teflon hose
2
5.20.2
Identify hose material and its fluid compatibility or incompatibility.
3
5.20.3
State the size designation of flexible fluid lines.
1
5.20.4
Describe the fabrication of flexible fluid lines for the following pressures:
a. Low
b. Medium
c. High
2
5.20.5
Explain the following procedures for a flexible line and associated end fittings:
a. Correct routing and installation
b. How lengthwise stripes are used to indicate twist
3
5.20.6
Specify the use and installation of swaged and reusable fittings.
2
5.20.7
Describe the use of protective sleeves and wrappings for flexible hose assemblies.
2
5.20.8
Explain the procedures for inspecting and testing aircraft pipes and hose assemblies,
including the storage and refitting of a previously installed hose assembly.
3
5.20.9
Determine:
a. What is meant by cold flow in a hose assembly
b. What may cause this defect
3
5.21
Clamps
5.21.1
Specify the classification, characteristics, uses and precautions associated with the
following aircraft clamps:
a. Hose clamps including Jubilee clips
b. Self locking hose clamps
c. Cushioned clamps or “P” clips
d. Plain clamps
Study Ref. 1, 2 & 6
Study Ref. 6
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Advisory Circular
5.22
5.22.1
AC66-2.2
Revision 3
Standard Fluid Line Markings
Study Ref. 1, 2 & 6
Detail the colour and marking codes for the following fluid lines:
a. Fuel
b. Water injection
c. Electrical conduit
d. Compressed gas
e. Instrument air
f. Pneumatic
g. Coolant
h. Hydraulic
i. Lubrication
j. Breathing oxygen
k. De icing
l. Fire protection
m. Air-conditioning
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Advisory Circular
6
6.1
6.1.1
6.1.2
AC66-2.2
Revision 3
Aircraft Cleaning
Cleaning Operations
Study Ref. 1 & 2
Specify the following terms, procedures, precautions and products associated with the
cleaning of aircraft and their components:
a. General cleaning requirements as a means of corrosion protection
b. Exterior cleaning
c. Interior cleaning
d. Types of cleaning operations including the common cleaning classifications such
as wet wash, dry wash and polish
e. Non-flammable aircraft cabin cleaning agents and solvents
f. Cleaning and protection of faying surfaces
g. Flammable and combustible agents
h. Fire prevention precautions
i. Fire protection recommendations
j. Powerplant cleaning
k. Dry-cleaning solvent
l. Aliphatic naphtha, white spirit, and Stoddards solvent
m. Aromatic naphtha including benzene, toluene and xytene
n. Safety solvent
o. MEK
p. Kerosene
q. Cleaning compounds for oxygen systems
r. Water emulsion cleaners
s. Solvent emulsion cleaners
t. Soaps and detergents
u. Nonionic detergent cleaners
v. Mild abrasive materials
w. Use of aluminium/steel wool
x. Abrasive paper
y. Crocus cloth, Scotch-Bright or similar proprietary materials
z. Phosphoric-citrus acid
aa. Baking soda
Specify common cleaning procedures, products and precautions relating to:
a. Windows, windshields and transparent plastics, including pre-clean flushing
b. GRP, FRP or modern plastic materials
c. Exterior metal structure
d. Wood and fabric structure
e. The use of caustic cleaning products on aluminium alloy structures
f. Oil and grease removal from tyres
g. Cleaning of airframe or propeller deicer boots
h. Exhaust tracks
i. Engine cowlings, cooling fins and other powerplant assemblies
j. Gas turbine engine compressors
k. Aluminium alloy or steel propeller blade cleaning, corrosion removal and crack
detection/prevention
l. Wheel wells
m. Brakes
n. Gaseous systems including oxygen bottles, masks and componentry
o. Removal of corrosion off anodised components and approved re-treatment
methods
p. Flushing air, vacuum and fluid system lines
q. Oil and fuel tanks
r. Interior upholstery and furnishings including special requirements for flame
retardant materials
s. Cockpits
t. Galleys
u. Waste and effluent systems
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Advisory Circular
v.
w.
x.
y.
z.
aa.
AC66-2.2
Revision 3
Air-conditioning systems
Sand, prunus, water, vapour, bead and shot blasting
Nickel cadmium and lead acid battery cases
Cleaning up and treating mercury spills
Cleaning and corrosion removal from control cables
Component cleaning and “blow through” with compressed air particularly after
sand or bead blasting
6.1.3
Specify the operational or safety effects that could occur where any of the components
or systems identified above remains in an unclean condition.
2
6.1.4
Explain the dangers and limitations associated with the use of chemical cleaners on
aircraft and aircraft components.
3
6.1.5
Describe pre-wash protection and post-wash maintenance procedures normally required
on aircraft to prevent:
a. Corrosion
b. Loss of system/component lubrication
c. Mechanical/electrical malfunctions
2
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Advisory Circular
7
AC66-2.2
Revision 3
Aircraft Painting and Finishing
7.1
Identification of Paint Finishes
7.1.1
Identify the various types of paint finish commonly used on aircraft.
7.2
Paint Finishing Materials
7.2.1
Describe the characteristics, uses and precautions relating to the following aircraft
finishing materials:
a. Acetone
b. Alcohol
c. Benzene
d. Thinners
e. Acrylic nitro-cellulose lacquer thinner
f. Cellulose nitrate dope and lacquer thinner
g. Volatile mineral spirits
h. Toluene
i. Turpentine
j. Dope
k. Nitro-cellulose lacquer
l. Acrylic nitro-cellulose lacquer
m. Paint drier
n. Linseed oil
o. Zinc chromate primer
p. Standard wash primer
q. Acrylic cellulose nitrate modified primer
r. Enamel
s. Varnish
t. Oil stain
u. Paint
v. Paint remover
w. Epoxy coating remover
x. Fluorescent paint remover
y. Masking material
7.3
Paint Finishing Processes
7.3.1
State the application of the following painting processes:
a. Synthetic enamels
b. Acrylic lacquer
c. Polyurethane
d. Acrylic urethanes
e. Special finishes and finishing products
1
7.3.2
Detail special precautions and handling requirements for these processes.
2
7.3.3
For given applications, state the advantages and disadvantages of each process.
2
7.3.4
Specify the physical conditions required for application of the various paint processes.
2
7.4
Primers and Priming
7.4.1
Specify the various priming processes in aircraft use detailing special precautions and
handling requirements.
2
7.4.2
State the advantages of particular primers for given applications
2
Study Ref. 3 & 4
1
Study Ref. 3 & 4
1
Study Ref. 3 & 4
Study Ref. 3 & 4
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Advisory Circular
AC66-2.2
Revision 3
7.5
Painting Equipment and Safety
7.5.1
Describe the following finishing equipment, facilities and safety procedures:
a. Paint room design and operation.
b. Air supply (including the three main requirements and approximate air
pressures).
c. Spray guns.
d. Respirators and safety equipment.
e. Viscosity measuring cup.
f. Mixing equipment.
g. Health and safety requirements.
1
7.5.2
Describe the spray gun and its operation with regard to:
a. Application techniques for various coatings.
b. Adjusting the spray pattern.
c. Applying the finish.
d. Sequence for painting an aeroplane.
e. Common finishing problems.
f. Clean-up.
1
7.6
Maintenance of Painted Surfaces
7.6.1
Describe the following:
a. Paint touch-up
b. Restoration of paint finishes
c. Paint system compatibility
7.7
Paint Stripping and Surface Preparation
7.7.1
Specify correct methods and techniques to be used for the removal of:
a. Old corrosion protection systems
b. Corrosion
2
7.7.2
Describe methods of degreasing and cleaning surfaces prior to surface treatment.
2
7.7.3
Describe the methods of surface pre-treatment associated with common painting
processes.
2
7.7.4
Detail the special safety precautions and requirements associated with the use of MEK
(methyl ethyl ketone) as a paint stripper and metal cleaner.
3
7.7.5
Identify common paint strippers
1
7.7.6
With respect to paint strippers, detail application and removal precautions, especially in
relation to other aircraft structure or structural components and susceptible materials.
3
7.7.7
Describe special processes relating to the painting of radomes and composite plastic
materials
1
7.8
Preparation of Paint
7.8.1
Describe the following processes associated with the preparation of paint:
a. Stirring
b. Thinning
c. Colour tinting and mixing
d. Straining
Study Ref. 3 & 4
Study Ref. 3 & 4
2
Study Ref. 3 & 4
Study Ref. 3 & 4
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AC66-2.2
Revision 3
7.9
Decals, Marking and Placards
7.9.1
Specify procedures and techniques for the proper application of the following items
found in general use on and in aircraft:
a. Decals
b. Marking
c. Placards
7.10
Paint Defects
7.10.1
Describe the following paint defects and identify their causes:
a. Poor adhesion
b. Spray dust
c. Sags and runs
d. Spray mottle
e. Blushing
Study Ref. 3 & 4
2
Study Ref. 3 & 4
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Advisory Circular
8
AC66-2.2
Revision 3
Gases and Compounds
8.1
Gaseous Oxygen Storage and Supply Systems
8.1.1
Explain the identification of high and low-pressure oxygen bottles.
3
8.1.2
Explain how breathing oxygen bottles are positively identified through colour coding and
stencilled lettering.
3
8.1.3
Detail oxygen system decontamination procedures.
3
8.1.4
Describe the maintenance and servicing requirements for oxygen trolleys.
2
8.1.5
Detail the oxygen replenishment procedures and precautions.
3
8.1.6
Detail safety precautions when handling oxygen cylinders and dispensing equipment,
including the dangers associated with the presence of petroleum products such as oil
and grease.
3
8.2
Aviation Gasses – Other than Oxygen
8.2.1
Detail the uses, storage, identification, characteristics and safety precautions associated
with the following gaseous compounds:
a. Nitrogen
b. Carbon dioxide
c. Freon
d. Helium
e. Compressed air
3
8.2.2
Specify the type of gas commonly used in:
a. Gas operated safety equipment on aircraft
b. Aircraft wheels
c. Air-conditioning systems
d. Shock struts
e. Accumulators
f. Inert gas welding systems
2
8.2.3
Detail precautions associated with the use of compressed air for cleaning aircraft and
aircraft components.
3
8.2.4
Evaluate the dangers associated with cleaning personal clothing and exposed body
parts with a compressed air gun.
3
Study Ref. 3 & 4
Various references in study material appropriate to where each gas is used.
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Advisory Circular
9
9.1
9.1.1
AC66-2.2
Revision 3
Aircraft Ground Handling
Ground Operations
Study Ref. 1 & 2
Specify the following aviation ground operations, safety precautions and the relevant
equipment used:
a. Marshalling and marshalling signals.
b. Refuelling/defuelling procedures and precautions
c. System replenishments
d. Long and short term storage
e. Picketing
f. Taxiing
g. Airfield tower communications including commonly used abbreviations,
transmitting technique, transmission of letters, numbers, time and standard
words and phrases, distress and urgency procedures
h. Taxi lanes and vehicular movements
i. Airfield and airport markings
j. Ground running and run-up areas
k. Safety zones around aircraft
l. Approaching and leaving aircraft
m. Control locks
n. Undercarriage locks
o. Aircraft levelling procedures
p. Hoisting
q. Attendance at a crash scene
r. Hearing protection
s. Aircraft tie-down
t. Ramp operations
2
9.1.2
Specify aircraft towing operations in respect of the following:
a. Towing arms
b. Weak links
c. Locking devices
d. Weight limits
e. Turning angle limits
f. Control of aircraft brakes
g. Lookouts
h. Tugs and tractors
2
9.1.3
Specify the aircraft jacking operations in respect of the following:
a. Principles of aircraft jacking
b. Safety precautions
c. Weight and balance limits
d. Jack types
e. Jacking points
f. Jacking techniques
g. Maintaining structural integrity while jacking (fitment of structural panels,
positioning of flight control surfaces, undercarriage precautions etc)
2
9.1.4
Describe ground de-ice and anti-ice procedures in respect of the following:
a. Removal of frost, ice and snow
b. Temperatures
c. Time limits
d. Materials
e. Application techniques
2
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Advisory Circular
AC66-2.2
Revision 3
9.2
General Aeronautical Practices and Processes
9.2.1
Describe the following:
a. Aircraft tool control systems
b. Foreign object damage control
c. Environmental protection and the effects of environmental conditions on aircraft
handling and operation
d. Aircraft jacks and levelling equipment
e. Protection from high intensity radiated field (HIRF)
f. Electrical, hydraulic and pneumatic ground supplies
g. Identification and operation of ground use fire extinguishers
h. Fire fighting techniques
i. Requirements for the use of personal safety equipment such as gloves, masks,
goggles, shields, respirators, overalls and special suits
j. Guarding of machinery
k. Spontaneous combustion of accumulated oily rags
l. Workshop cleanliness
m. Working in adverse conditions such as; confined spaces, hot, cold, wet and
windy conditions
Various references in textbooks, maintenance manuals and aircraft operating
instructions.
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